No connection to TM from Trados translation panel

Although the TermBase I was satisfactorily working with previously in this same project still appears as selected and activated in the project settings, Trados does not connect to it while translating and does not prompt any term recognition nor can I do searches in it from Trados during the translation stage. It was working properly days ago. Also, I cannot add any term to the TB from Trados while working (selecting the term in both source and target segment, right click on mouse, "add as new term/quickly").
Please let me know how to fix this, I really need to work with this TM
Kind regards,
Cristina

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